China LX918 Marine Limit Switch - Reliable Suppliers & Factory for AC/DC Voltage Applications
Advantage
All products of the company can be customized for production according to user usage scenarios.
Structure and Working Principle
The shell of the limit switch is made of cast iron, which has good mechanical strength and good corrosion resistance. The performance of the material will not deteriorate under the environmental conditions of marine ships. The shell type is protective, and the protection level can reach IP67. Due to the action of the spring, it can automatically reset. Operating position: 5°→0°-45° The opening and closing of the limit switch contacts are determined by the cam position.
The agreed heating current of the limit switch is 16A; the rated insulation voltage is 500V; the rated working voltage (Uc) and the rated working current (le) correspond to the technical data.
The rated working voltage of the DC controlled 5.5Kw three-phase squirrel cage asynchronous motor is below 440V and the rated working current is 12A.
Working Conditions
1
Altitude: The altitude of the installation location does not exceed 2,000 meters.
2
Medium Temperature: The ambient air medium temperature is not higher than +75℃ and not lower than -25℃.
3
Relative Humidity: The average relative air humidity in the wettest month of the installation location is not greater than 90% (the average minimum temperature in the month is not greater than +25°C).
4
Pollution Level: The pollution level of environmental conditions is Level III.
5
Installation Category: The installation category is Category I.
6
Types of Limit Switches: Structural types are divided according to structural types: The structure of this product is rotary type, and the speed ratios are: 80:1, 40:1, and 20:1. Control loops are divided according to control loops: this limit switch can be equipped with up to 8 control loops.
| Environmental Conditions | Rated Data | Project | Ue (V) | le (A) |
|---|---|---|---|---|
| Environmental control temperature | -25℃ - +45℃ | AC | 500 | 2.00 |
| Moist air at sea | Yes | 380 | 2.60 | |
| Oil, mold | Yes | 220 | 4.60 | |
| Tilt | Any tilt | DC | 440 | 0.14 |
| Swing | ≤ 45℃ | 220 | 0.27 | |
| Vibration, shock, shock Britain | Yes | 110 | 0.55 |
Overall and Installation Dimensions
A contact group (2) is installed in the travel switch housing, and the moving contact and the stationary contact thereof drive the cam on the switch shaft (4) to open and close the contacts as the operating arm (3) rotates. The positioning of the operating arm is achieved by means of a positioning member (5), a positioning spring (6), a positioning lever (7) and a roller (8).
Use and Maintenance
Frequently Asked Questions (FAQ)
What materials are used for the limit switch housing?
The shell of the limit switch is made of high-strength cast iron, which offers excellent mechanical strength and superior corrosion resistance, ensuring it does not deteriorate in marine environments.
What is the protection rating of this limit switch?
The housing features a protective design with an ingress protection level reaching IP67, safeguarding it against dust and water ingress.
What are the ambient temperature limits for installation?
The limit switch operates reliably in ambient air medium temperatures ranging from a minimum of -25°C to a maximum of +75°C.
What speed ratios are available for the rotary limit switch?
This rotary structural type limit switch is available in speed ratios of 80:1, 40:1, and 20:1.
How many control loops can this limit switch support?
The limit switch is highly versatile and can be configured to support up to 8 independent control loops.
Does the limit switch support automatic reset functionality?
Yes, due to the integrated spring action, the limit switch is designed to reset automatically during operation.